Electron microscopy - TEM

Electron microscopy

have much higher resolutions due to high energy electrons

tranmission electron microscopes (TEM)

use a high voltage electron beam to produce an image, and the electrons that pass through the sample are detected

scanning electron microscope

produce an image by probing the surface of a specimen

reflection electron microscope

use an electron beam that is pointed at a thin specimen to detect the scattered electrons that are reflected by the specimen

TEM

• utilize electrons instead of light

• dense structures absorb a lot of electrons and create a dark spot on the resulting image

• image is always black and white

• uses magnets to bundle electrons

• very thin slice of specimen is needed